Now, let's look at the types of systems. Exhaust-only. All right, let's get this one out of the way first. Using exhaust fans is great for local ventilation of bathrooms, kitchens, garages, and sub-slab areas (for radon control), but it's not a great strategy for whole-house ventilation. It does have some advantages: It's cheap.
When writing Common Sense, Paine wanted to show the common man why the United States should be independent of England. He also wanted to show these people that they had the resources needed to build a navy.
The technique was to use what Thomas Paine thought was common sense to persuade people into believing what he expected to be an obvious thing. The audience were both loyalists who were unsure in joining the American rebels and the rebels who were leaning towards the side of the loyalists. It was written in such a way that common people could interpret concepts and to promote the rebellion.